package com.qf.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/*")
public class AllFilter implements Filter {
    public void init(FilterConfig config) throws ServletException {

    }

    //过滤方法
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        HttpServletRequest request = (HttpServletRequest) req;//req:ServletRequest 是HttServletRequest的父接口
        HttpServletResponse response = (HttpServletResponse) resp;
        String method = request.getMethod();
        if("POST".equals(method)){
            request.setCharacterEncoding("utf-8");
        }
        response.setContentType("text/html;charset=utf-8");
        chain.doFilter(req, resp);
    }

    public void destroy() {
    }

}
